basho/velvet — pull request #13 by kellymclaughlin (2013-09-26 21:04:40+00:00)
Title: Fix rebar.config.script check for OTP version

Some new functions were added to the crypto API after R15B01, but the hmac/3
and hmac/4 functions did not arrive until R16. Only set new_hash if the OTP
version is R16 or above.